中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 24 No. 1 January 2014 |
（1. Department of Mechanical Engineering, Roever College of Engineering and Technology,
Perambalur, 621212, Tamil Nadu, India;
2. Department of Mechanical Engineering, Kalaivani College of Technology, Coimbatore, 641105, Tamil Nadu, India;
3. Department of Mechanical Engineering, V V College of Engineering, Tisaiyanvilai, 627657, Tamil Nadu, India;
4. Department of Mechanical Engineering, Coimbatore Institute of Technology,
Coimbatore, 641014, Tamil Nadu, India）
Abstract:The microstructure and mechanical characterization of dissimilar friction stir welded AA5083-H111 and AA6351-T6 aluminum alloys were studied. Three different welding speeds (36, 63 and 90 mm/min) were used to weld the dissimilar alloys. The effect of welding speed on mechanical and metallurgical properties was analyzed. It is found that the welding speed of 63 mm/min produces better mechanical and metallurgical properties than other welding speeds. The weld zone is composed of three kinds of microstructures, namely unmixed region, mechanically mixed region and mixed flow region. The fracture mode was observed to be a ductile fibrous fracture.
Key words: aluminum alloys; friction stir welding; welding speed; tensile strength; microstructure
